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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2019-05-20 12:17:46 -0300
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2019-10-18 11:01:13 -0300
commit720e9541f5d919f3735925a4e6324ecdec171844 (patch)
tree1fdb4b8b70451d97be8256674cf922edfdf8f945 /sysdeps/unix/sysv/linux/mips
parent2901743568452403849be7295c8732faa7732339 (diff)
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Update sysvipc kernel-features.h files for Linux 5.1
Linux 5.1 adds missing SySV IPC syscalls to the syscall table for
remanining one that still uses the ipc syscall on glibc (m68k, mips-o32,
powerpc, s390, sh, and sparc32).  However the newly added direct ipc
syscall are different than the old ones:

  1. They do not expect IPC_64, meaning __IPC_64 should be set to zero
     when new syscalls are used.  And new syscalls can not be used
     for compat functions like __old_semctl (to emulated old sysvipc it
     requires to use the old __NR_ipc syscall without __IPC_64).
     Thus IPC_64 is redefined for newer kernels on affected ABIs.

  2. semtimedop and semop does not exist on 32-bit ABIs (only
     semtimedop_time64 is supplied).  The provided syscall wrappers only
     uses the wire-up syscall if __NR_semtimedop and __NR_semop are
     also defined.

Checked on x86_64-linux-gnu and i686-linux-gnu on both a 4.15 kernel
configure with default options and sysvipc tests on a 5.3.0 kernel with
--enable-kernel=5.1.

Tested-by: Paul A. Clarke <pc@us.ibm.com>
Diffstat (limited to 'sysdeps/unix/sysv/linux/mips')
-rw-r--r--sysdeps/unix/sysv/linux/mips/kernel-features.h12
1 files changed, 8 insertions, 4 deletions
diff --git a/sysdeps/unix/sysv/linux/mips/kernel-features.h b/sysdeps/unix/sysv/linux/mips/kernel-features.h
index 7123b362ee..ad5b1ace82 100644
--- a/sysdeps/unix/sysv/linux/mips/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/mips/kernel-features.h
@@ -31,8 +31,12 @@
    pairs to start with an even-number register.  */
 #if _MIPS_SIM == _ABIO32
 # define __ASSUME_ALIGNED_REGISTER_PAIRS	1
-/* mips32 only supports ipc syscall.  */
-# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+/* mips32 only supports ipc syscall before 5.1.  */
+# if __LINUX_KERNEL_VERSION < 0x050100
+#  undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+#  undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
+# else
+# endif
 
 /* The o32 MIPS fadvise64 syscall behaves as fadvise64_64.  */
 # define __ASSUME_FADVISE64_AS_64_64		1
@@ -40,6 +44,8 @@
 /* mips32 support wire-up network syscalls.  */
 # define __ASSUME_RECV_SYSCALL		1
 # define __ASSUME_SEND_SYSCALL		1
+#else
+# undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
 #endif
 
 /* Define that mips64-n32 is a ILP32 ABI to set the correct interface to
@@ -50,5 +56,3 @@
 
 #undef __ASSUME_CLONE_DEFAULT
 #define __ASSUME_CLONE_BACKWARDS	1
-
-#undef __ASSUME_SYSVIPC_DEFAULT_IPC_64